Calculate Vibration Amplitude, Frequency Range for Derrick Drilling

[yakin28]

I have a steel drilling Derrick 240 feet high mounted central to a ship, this is used for drilling for oil. Calculations have been done on the Derrick in regards to reaction forces in different modes of operation(drilling, transit etc). I need to do a vibration analysis of different points on this structure with the figures to hand.
I am in the believe that high amplitude >3mm @ 0-50 Hz frequency is expected of this type of structure in operating conditions.
How do I calculate the vibration amplitude, frequency range and expected acceleration?

 

[Zinov]

Hi Yakin,
How do I calculate the vibration amplitude, frequency range and expected acceleration?

means the acceleration amplitude? do you want a measurement or calculation driven from model.

if you know the : accelartion you can retrieve the velocity and than the dis-placement
question

please detail more wht u want to achieve